Art of maeing ttjen buckles



OOOOOOOO Patented May 7, 1889.

i s sheets sheet 2. J. H. SIMPSON.

` AAAAAAAAAAAAA RN-` BBBBBB S.

(No Model.) l 3 Sheets--Sheet 3.

' J. H. SIMPSHV. A ART OP MAKING TURN BUCKLES.

No. 402,694. Patented May '7, 1889.

N. Firms, Pmwumgmpher. wami a UNITED STATES ATENT OFFICE.

JAMES H. SIMPSON, OF PITTSBURG, PENNSYLVANIA, ASSIGN OR TO OARNEGIE,PI-IIPPS t COMPANY, (LIMITEDQ OF SAME PLACE.

ART OF MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 402,694, dated May 7,1889.

Application led October 22, 1888.

.T all whom it may concern:

Be it known that I, JAMES H. SIMPSN, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement inthe Art of Making Turn-Buckles; and I do hereby declarethe yfollowing to be a full, clear, and exact description thereof,reference being had to the accompanying drawings, formingpart of this 1ospecification, in Which- I Figure 1 is an end view of the blank fromwhich the turn-buckles are made according to my process. Fig. 2 is aplan view thereof. Fig. 3 is a plan View of one of the flatteningdieswhich I use to flatten the blank in practicing the iirst step of theprocess. Fig. 4 is a vertical longitudinal section of the twoiiattening-dies with an interposed blank. Fig. 5 is a verticallongitudinal section of the punch 2o which is used for cutting the blankin order to form the straps. Fig. 6 is a cross-section of the toolswhich I employ in spreading the strap-pieces after the blank has beencut, as just stated. Fig. 7 is a vertical longitudinal section showingthe forging-dies and the end compressing and punching dies with aninterposed blank. Fig. 8 is a vertical cross-section on the line a; a:of Fig. 7. Fig. 9 is a vertical cross-section on the line y y of Fig. 7.The

3o iigures on Sheet 3 of the drawings illustrate another mode of formingthe flattened solid blank with enlarged ends from which the buckles aremade. Fig. 10illustrates the original blank in end View. Fig. 11 is aplan view,

3 5 and Fig. 12 is an edge view thereof. Fig. 13 is an end view of theblank in connection with the dies for compressing and enlarging theends, and Fig. 14 is a plan view of the blank either of Fig. 12 or Fig.4 after it has 4o been punched by the mechanism shown in Fig. 5.

Like symbols of reference indicate like parts in each.

In practicing my invention I take a blank,

2, consisting of an integral piece of metal of a little greater lengththan the desired length of the finished turn-buckle and preferablycylindrical in shape, Figs. 1 and 2, and form it by suitable means sothat its end portions 5o shall be large relatively to its middleportion.

Serial No. 288,782. (No model.)

I illustrate tools for this purpose in Figs. 3 and 4, consisting of twodies, 5 and 6, having end cavities, which are adapted to leave theextremities of the blank unreduced, and having at the middle projectingportions, which compress and reduce the interposed blank when the latteris heated to a welding heat,

as will be readily understood. I then take the flattened blank and placeit on the bolster 3 of a punch, Fig. 5, and by means of the 6o moving'or male punch 4, which is adapted to work into the cavity of the bolsterand is of the same length as that of the desired out, I cut theflattened portion of the blank longitudinally, preferably eXsecting apiece therefrom and bringing it into the form shown in Fig. 14. Theconstruction and mode of operation of the punch are suflicientlyillustrated in the drawings, the cavity of the bolster being of propershape to receive and 7o hold the blank. I then preferably spread the cutportions of the blank, in order to widen the straps out to their properposition. This I do by means of the apparatus shown in Fig. 6, whichcomprises a block or anvil, 7, 75 having a cavity of the proper shapeand size to receive the blank, the width of the cavity beingsubstantially that of the finished buckle, and an expanding or spreadingmandrel, 8, having a wedge-shaped lower end, which is 8o adapt-ed toenter the cut portion of the blank and to spread out the sides thereofinto contact with the sides of the cavity against which they arecompressed and shaped. The spreading of the straps is unnecessary incase the punch 4 be made wide enough to cut the cavity in the blank ofthe proper width desired between the straps of the finished turn-buckle.The flattened, cut, and spread blank is then ready to have the strapsand the ends or nut 9o portions forged and shaped. I prefer to do thisin the dies which are shown in Figs. 7, 8, and 9. These comprise twodies, 9 9, which are adapted to operate on the sides of the turnbuckleblank, having longitudinal cavities for the straps, central tongues, 10,which work in the space between the spread straps, and end cavitieswhich receive the end or nut portions of the blank, There are also enddies carried on plungers 11, having project- Ioo ing punch-tongues12 andannular portions or collars 13 at the bases of the tongues 12, which areadapted to engage the ends of the nuts of the buckle.

The plungers 11 are adapted to move up to the ends of the dies 9, sothat the tongues 12 on the plungers shall enter the ends of a blankinterposed between these dies.

In using the dies the blank, having been heated to a Welding heat, isplaced between them, and the dies are actuated by cams or other suitablemechanism, so as to force them upon the interposed blanks. The action ofthese dies compresses the straps of the blank edgewise, forging theminto proper shape and holding the blank very firmly. rlhe plungers 11are operated so as to force the tongues 12 longitudinally into the endsof the blank, and these tongues, forcing their Way into the blank,displace the metal thereof, causing it to flow out laterally into therecesses 1st in the cavities of the dies, thus giving the proper shapeand proportions to the nuts, and the collars 13, at the bases of thetongues, engag ing the ends of the blank, compress them inwardly. diesafter the latter have been retracted, and the buckle will be found. tobe reduced to its proper shape and form, making it necessary only toremove the thin shells of metal at the inner ends of the cavities of thenut by punching or drilling. The nuts can then be screwthreaded in theusual Way.

In Figs. 10, 11, 12, and 13 I show another mode of forming the blank;with thickened end portions and relatively thinner middle portion.Instead of reducing the middle of the blank by forging, as shown inFin'. 4, I thicken up the end portions, leaving the middle untouched,the results produced in both modes being substantially the same. ThusItake the solid blank made rectangular in cross-section, as shown inFigs. 10, 11, and 12, and by means of the dies b and c (shown in Fig.13) I forge the ends of the blanks edge- Wise, and thus thicken them,reducing them to the form shown by dotted lines in Figs. 11 and 12,Whilethe middle portion remains flat and of its original cross-sectionaldimensions. Then the middle portion of the blank is cut outlongitudinally by the punch shown in Fig. 5, and the subsequentoperations on the blank. to reduce it to the form of the finished buckleare the same as before described.

By use of the expression flattened blank in the following claims Iintend to designate a blank having end portions which are thick in onecrosssectional dimension relatively te the middle portion, and arenarrow in the other dimension relatively thereto, substantially as shownin Figs 12 and et.

The blank is then removed from the V The advantages of my improvedprocess Will be appreciated by those skilled in the art. By it I amenabled to make turn-buckles very rapidly and With a minimum of laborand cost, and the buckles produced possess great strength anduniformity.

I do not desire to limit myself strictly to the means which I have shownand described for carrying out the process, since otherinstrumentalitics may be employed, such as will be understood by thoseskilled in the art; nor do I desire to limit my process strictly to theprecise steps which I have described for car rying it into effect.

What I claim, and desire to secure by Letters Patent, is

1. An improvement in the art of making turnbuckles, which consists incutting a solid blank longitudinally to form the straps, forging andcompressing the straps, and forging and shaping the nuts, substantiallyas and for the purposes described.

2. An improvement in the art of making turirbuckles, Which consists informing a flattened blank, cutting the same longitudinally to form thestraps, and forging and shaping the straps and the ends or nuts,substantially as and for the purposes described.

3. An improvement in the art of making turn-buckles, which consists informing a blank with straps and with solid ends and punching andcompressing said ends longitudinally, displacing the metal thereoflaterally, the said ends being confined Within diecavities suitablyrecessed, into which recesses the displaced metal fioWs, substantiallyas and for the purposes described.

et. An improvement in the art of making turn-buckles, which consists informing the Vstraps of a blank having solid ends, punching andcompressing said ends longitudinally and displacing the metal thereoflaterally, the said ends being confined Within die-cavi ties suitablyrecessed, into which recesses the displaced metal flows, andsimultaneously compressing and forging the straps, substantially as andfor the purposes described.

5. An improvement in the art of making turn-buckles, which consists informing a fiattened blank with solid ends, cutting the samelongitudinally, spreading the cut side portions of the blank, and thencompressing and forging the said side portions, and punching the endportions to form the nuts, substan tially as and for the purposesdescribed.

In testimony whereof I have hereunto set my hand this 4th day ofOctober, A. D. 1858.

JAMES lI. SIMPSON.

Witnesses:

W. B. Cont/vin, J. K. SMITH.

IOO

IIO

